Rekai Nyangadzayi Musuka
8bb7ea6be6
fix(cpu): interim solution to weird program counter behaviour on illegal tst instruction
2022-10-21 05:12:01 -03:00
Rekai Nyangadzayi Musuka
60a1f7fa99
chore(cpu): implement behaviour for undefined test instruction
2022-10-21 05:12:01 -03:00
Rekai Nyangadzayi Musuka
b3b8182f85
fix(cpu): fix PC offset when barrel shifter and bit 4 of DP is set
2022-10-21 05:12:01 -03:00
Rekai Nyangadzayi Musuka
56e660714c
fix(cpu): implement S set + rd == 15 case for data processing
2022-10-21 05:12:01 -03:00
Rekai Nyangadzayi Musuka
eb632056a2
feat(cpu): implement banked registers
2022-10-21 05:12:01 -03:00
Rekai Nyangadzayi Musuka
fbc9de0335
fix(cpu): improve MRS and MSR instructions
2022-10-21 05:12:01 -03:00
Rekai Nyangadzayi Musuka
5c7539cd26
feat(cpu): implement CMN
2022-10-21 05:12:00 -03:00
Rekai Nyangadzayi Musuka
7c20e5fdb5
fix(barrel_shifter): fix PC being 1 word ahead in barrel shifter
2022-10-21 05:12:00 -03:00
Rekai Nyangadzayi Musuka
f79e7126ee
feat(cpu): Implement RSC
2022-10-21 05:12:00 -03:00
Rekai Nyangadzayi Musuka
15e92bc6af
feat(cpu): implement RSB
2022-10-21 05:12:00 -03:00
Rekai Nyangadzayi Musuka
47fc96fe00
feat(cpu): implement BIC
2022-10-21 05:12:00 -03:00
Rekai Nyangadzayi Musuka
4ac5ad42c6
feat(cpu): implement EOR
2022-10-21 05:12:00 -03:00
Rekai Nyangadzayi Musuka
c93153672f
feat(cpu): implement ADD
2022-10-21 05:11:59 -03:00
Rekai Nyangadzayi Musuka
a46dd448f4
feat(cpu): implement fix for ADC and implement SBC
2022-10-21 05:11:59 -03:00
Rekai Nyangadzayi Musuka
01f75112ce
chore(barrel_shifter): remove panic from ASR
2022-10-21 05:11:59 -03:00
Rekai Nyangadzayi Musuka
051b98bc02
fix(barrel_shifter): should not modify cpsr when amount == 0
2022-10-21 05:11:59 -03:00
Rekai Nyangadzayi Musuka
5d0bc1b335
chore(cpu): refactor the barrel shifter once again
2022-10-21 05:11:59 -03:00
Rekai Nyangadzayi Musuka
43d011538e
feat(cpu): implement ADC
...
ADC interacting w/ the Barrel Shifter is not working though
2022-10-21 05:11:59 -03:00
Rekai Nyangadzayi Musuka
f3ad5e90ff
feat(cpu): implement RRX for Barrel Shifter
2022-10-21 05:11:58 -03:00
Rekai Nyangadzayi Musuka
9b867c02e0
feat(cpu): implement SUB in THUMB format 3
2022-10-21 05:11:58 -03:00
Rekai Nyangadzayi Musuka
2ba09868ba
feat(cpu): implement ARM SUB in data processing
2022-10-21 05:11:58 -03:00
Rekai Nyangadzayi Musuka
9394754593
feat(cpu): implement MVN
2022-10-21 05:11:58 -03:00
Rekai Nyangadzayi Musuka
41bab3d6ba
chore(cpu): refactor barrel shifter
2022-10-21 05:11:58 -03:00
Rekai Nyangadzayi Musuka
99b686b2d7
fix(cpu): use barrel shifter in data processing immediates
2022-10-21 05:11:58 -03:00
Rekai Nyangadzayi Musuka
daad98bbfe
feat(cpu): implement format 12 thumb instructions
2022-10-21 05:11:57 -03:00
Rekai Nyangadzayi Musuka
2fb01577af
feat(cpu): implement some already decoded format 3 instructions
2022-10-21 05:11:57 -03:00
Rekai Nyangadzayi Musuka
96d21f27a5
feat(cpu): implement THUMB format 5 instructions
2022-10-21 05:11:57 -03:00
Rekai Nyangadzayi Musuka
793110f315
chore: mgba log now supports printing THUMB instructions
2022-10-21 05:11:57 -03:00
Rekai Nyangadzayi Musuka
5ed5c5d52d
feat(cpu): implement like 1 THUMB instruction
2022-10-21 05:11:57 -03:00
Rekai Nyangadzayi Musuka
01385ee46b
chore: distinguish between undefined ARM and THUMB instr
2022-10-21 05:11:57 -03:00
Rekai Nyangadzayi Musuka
0eba3aca1f
chore(cpu): lay groundwork for THUMB instruction decoding and execution
2022-10-21 05:11:57 -03:00
Rekai Nyangadzayi Musuka
83a5370196
chore(cpu): refactor ARM functions to make room for THUMB
2022-10-21 05:11:56 -03:00
Rekai Nyangadzayi Musuka
b0b6247f06
fix(cpu): fix conditions for GT cond
2022-10-21 05:11:56 -03:00
Rekai Nyangadzayi Musuka
2a33716166
fix(cpu): fix imm value calculation in MSR
2022-10-21 05:11:56 -03:00
Rekai Nyangadzayi Musuka
9b26454c72
fix(cpu): resolve off-by-one error when executing LDM
2022-10-21 05:11:56 -03:00
Rekai Nyangadzayi Musuka
97b933d9ea
feat(cpu): implement branch and exchange
...
If I want to continue with armwrestler, I'll have to implement
THUMB instructions now
2022-10-21 05:11:56 -03:00
Rekai Nyangadzayi Musuka
ff70aadfdb
fix(cpu): make Data Processing instructions r15-aware
2022-10-21 05:11:55 -03:00
Rekai Nyangadzayi Musuka
ae53f92d40
fix(cpu): make LDRH and STRH aware of r15
2022-10-21 05:11:55 -03:00
Rekai Nyangadzayi Musuka
f51e1d3154
fix(cpu): account for r15 in LDR and STR instructions
2022-10-21 05:11:55 -03:00
Rekai Nyangadzayi Musuka
a21f94569f
fix(cpu): flip two branches in PSR Transfer execution
2022-10-21 05:11:55 -03:00
Rekai Nyangadzayi Musuka
b9255bffe7
feat(cpu): implement MSR and MRS
2022-10-21 05:11:55 -03:00
Rekai Nyangadzayi Musuka
e1f8400343
feat(cpu): stub PSR Transfer instructions
2022-10-21 05:11:55 -03:00
Rekai Nyangadzayi Musuka
52493831cc
chore(io): implement IE and IME
2022-10-21 05:11:54 -03:00
Rekai Nyangadzayi Musuka
00ba7afac4
chore: remove some magic constants
2022-10-21 05:11:54 -03:00
Rekai Nyangadzayi Musuka
97e663febf
fix(bus): remove accidental recursion
2022-10-21 05:11:54 -03:00
Rekai Nyangadzayi Musuka
9a5959e46c
fix(cpu): write results of ORR to destination register
2022-10-21 05:11:54 -03:00
Rekai Nyangadzayi Musuka
780c717409
feat(cpu): implement TEQ
2022-10-21 05:11:53 -03:00
Rekai Nyangadzayi Musuka
34c6df344d
feat(cpu): Implement ORR
2022-10-21 05:11:53 -03:00
Rekai Nyangadzayi Musuka
670347d4a0
feat(bus): implement IWRAM and EWRAM
2022-10-21 05:11:53 -03:00
Rekai Nyangadzayi Musuka
e0c4b3b407
fix(ppu): properly access Mode 4 palette
2022-10-21 05:11:53 -03:00
Rekai Nyangadzayi Musuka
cffffab8ea
feat(cpu): refactor LDM/STM
2022-10-21 05:11:53 -03:00
Rekai Nyangadzayi Musuka
527bd2889e
feat(cpu): implement LDM/STM
2022-10-21 05:11:53 -03:00
Rekai Nyangadzayi Musuka
15dc4ce03a
chore(io): DISPSTAT bits 3 and 4 better match GBATEK documentation
2022-10-21 05:11:52 -03:00
Rekai Nyangadzayi Musuka
4f629227ab
fix(cpu): fix off-by-word bug in BL
2022-10-21 05:11:52 -03:00
Rekai Nyangadzayi Musuka
caa799853e
feat(bus): have VCOUNT be addressable on the bus
2022-10-21 05:11:52 -03:00
Rekai Nyangadzayi Musuka
3590215d33
feat(ppu): implement Mode 4
...
Implementation is not tested. Pending on LDM and STM so that I can
run beeg.gba
2022-10-21 05:11:52 -03:00
Rekai Nyangadzayi Musuka
d6aafc61bd
chore(io): rename some io bitfield fields
2022-10-21 05:11:52 -03:00
Rekai Nyangadzayi Musuka
357211a4cc
chore: remove premature inlines
2022-10-21 05:11:52 -03:00
Rekai Nyangadzayi Musuka
c4c4332485
chore: add FPS counter
2022-10-21 05:11:51 -03:00
Rekai Nyangadzayi Musuka
2cec8d9f70
chore: improve code clarity
2022-10-21 05:11:51 -03:00
Rekai Nyangadzayi Musuka
8348d7c4bc
feat(ppu): improve timings + implement BG mode 3 bitmap
2022-10-21 05:11:51 -03:00
Rekai Nyangadzayi Musuka
c33068d831
fix: allocate framebuf on heap
2022-10-21 05:11:51 -03:00
Rekai Nyangadzayi Musuka
f28b963f9d
chore: add code for heap alloc of white texture
2022-10-21 05:11:51 -03:00
Rekai Nyangadzayi Musuka
7fc77f993f
chore(gui): switch from RGBA8888 to BGR5555 to match BG Mode 3
2022-10-21 05:11:51 -03:00
Rekai Nyangadzayi Musuka
0e0b21d8c3
feat: draw white texture using SDL2
2022-10-21 05:11:50 -03:00
Rekai Nyangadzayi Musuka
f3ad0eb3aa
fix(ppu): deallocate palette RAM on cleanup
2022-10-21 05:11:50 -03:00
Rekai Nyangadzayi Musuka
036b861b05
chore: code cleanup
2022-10-21 05:11:50 -03:00
Rekai Nyangadzayi Musuka
880546468c
chore(bus): refactor bus.zig
2022-10-21 05:11:50 -03:00
Rekai Nyangadzayi Musuka
1a9c9ba4cb
chore: refactor instruction exec code
2022-10-21 05:11:50 -03:00
Rekai Nyangadzayi Musuka
a9e7140a88
chore(io): alias @This() to Self in io.zig
2022-10-21 05:11:50 -03:00
Rekai Nyangadzayi Musuka
808633deb7
chore: refactor bios.zig and pak.zig
2022-10-21 05:11:49 -03:00
Rekai Nyangadzayi Musuka
ee4fcd926b
fix: by convention deinit() should not take pointers to self
2022-10-21 05:11:49 -03:00
Rekai Nyangadzayi Musuka
9d1229fe0c
feat: implement PPU Timings in Scheduler
2022-10-21 05:11:49 -03:00
Rekai Nyangadzayi Musuka
d54c8df7b3
feat(sched): add HBlank and VBlank events to the scheduler
2022-10-21 05:11:49 -03:00
Rekai Nyangadzayi Musuka
d495f5b4c5
feat: implement S (when rd != 15) for several data processing instructions
2022-10-21 05:11:49 -03:00
Rekai Nyangadzayi Musuka
788bef188d
feat: implement dedicated Barrel Shifter SHL and SHR
2022-10-21 05:11:49 -03:00
Rekai Nyangadzayi Musuka
bff9be03cc
chore: stub TST
2022-10-21 05:11:48 -03:00
Rekai Nyangadzayi Musuka
44424e0687
chore: comment-out logging by default
2022-10-21 05:11:48 -03:00
Rekai Nyangadzayi Musuka
4b43dcd256
fix(cpu): improve LDR/STR write-back logic
2022-10-21 05:11:48 -03:00
Rekai Nyangadzayi Musuka
47805fb60c
feat(bus): implement Palette RAM and DISPSTAT
2022-10-21 05:11:48 -03:00
Rekai Nyangadzayi Musuka
abe2fc431e
fix(bus): restrict Game ROM and VRAM to a 16-bit bus
2022-10-21 05:11:48 -03:00
Rekai Nyangadzayi Musuka
46c694d95a
fix(cpu): properly implement SUB/CMP CSPSR carry bit condition
2022-10-21 05:11:48 -03:00
Rekai Nyangadzayi Musuka
faced77161
fix(cpu): resolve reversed if statement + write back on W = 0
2022-10-21 05:11:47 -03:00
Rekai Nyangadzayi Musuka
32f0b9d71c
chore: add mgba compatible (minus disasm) log function
2022-10-21 05:11:47 -03:00
Rekai Nyangadzayi Musuka
bbdcc0a8c2
chore: rename CPSR u32 from val to raw
2022-10-21 05:11:47 -03:00
Rekai Nyangadzayi Musuka
67bf975034
chore: remove print statements
2022-10-21 05:11:47 -03:00
Rekai Nyangadzayi Musuka
da7300a78c
chore: remove all memory leaks
2022-10-21 05:11:47 -03:00
Rekai Nyangadzayi Musuka
5c5179a553
feat(ppu): implement VRAM
2022-10-21 05:11:47 -03:00
Rekai Nyangadzayi Musuka
dcf78d0f76
fix(emu): prevent infinite loop when advancing scheduler
2022-10-21 05:11:46 -03:00
Rekai Nyangadzayi Musuka
4836ea3bcf
fix(io): fix DISPCNT is at wrong IO address
2022-10-21 05:11:46 -03:00
Rekai Nyangadzayi Musuka
182392bf1c
feat(cpu): properly implement STR STRH and STRB
2022-10-21 05:11:46 -03:00
Rekai Nyangadzayi Musuka
c6de540c8a
feat(cpu): implement skipBios method
2022-10-21 05:11:46 -03:00
Rekai Nyangadzayi Musuka
82fb5e7a93
chore: panic on read from BIOS
...
GBA Bios requires a lot of implemented features, so we're ignoring it
for now
2022-10-21 05:11:46 -03:00
Rekai Nyangadzayi Musuka
cbcc6282df
feat(bus): add Io Struct
...
Also, add more information to all panic messages
2022-10-21 05:11:46 -03:00
Rekai Nyangadzayi Musuka
614ac4a262
chore: rename consturctors to fit convention
2022-10-21 05:11:45 -03:00
Rekai Nyangadzayi Musuka
80d49e03d6
chore: move bitfield library to lib director
...
I'd presonally prefer to use a git submodule here but It doesn't quite
seem like git submodules are possible for individual files. I'll have to
check with FlorenceOS every once and a while to ensure that there are no
lingering soundness issues with the library.
Thanks to @N00byEdge for this wonderful library!
2022-10-21 05:11:45 -03:00
Rekai Nyangadzayi Musuka
7016fcdb79
chore: use bitfield library
2022-10-21 05:11:45 -03:00
Rekai Nyangadzayi Musuka
f030889d6c
feat(bus): emu is now able to read from user-provided BIOS
2022-10-21 05:11:45 -03:00
Rekai Nyangadzayi Musuka
d50aff30c9
feat(bus): implement Gameboy Advance MMIO
2022-10-21 05:11:45 -03:00
Rekai Nyangadzayi Musuka
5cbfae677a
feat: implement ROM CLI argument
2022-10-21 05:11:45 -03:00
Rekai Nyangadzayi Musuka
d660babecd
fix(cpu): purposely overflow when calculating PC during branch
2022-10-21 05:11:44 -03:00
Rekai Nyangadzayi Musuka
cb06c20864
feat(cpu): implement condition field behaviour
2022-10-21 05:11:44 -03:00
Rekai Nyangadzayi Musuka
c98e8d384a
chore: conform to zig style guides
2022-10-21 05:11:44 -03:00
Rekai Nyangadzayi Musuka
446eeba094
chore: run zig fmt
2022-10-21 05:11:44 -03:00
Rekai Nyangadzayi Musuka
e841bf44ca
chore(cpu): iron out some false assumptions
2022-10-21 05:11:44 -03:00
Rekai Nyangadzayi Musuka
1991bd8525
feat: implement LDR STR
2022-10-21 05:11:44 -03:00
Rekai Nyangadzayi Musuka
6c6d7d463d
chore: run zig fmt
2022-10-21 05:11:43 -03:00
Rekai Nyangadzayi Musuka
5b3b81e4dc
Initial Commit
2021-12-29 15:09:00 -06:00
